Why Do Your Knuckles Pop?

Surely you wondered why do your knuckles pop. Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous?

Eleanor Nelsen gives the facts behind joint popping.

Human anatomy in digital age
Cool anatomical X-ray GIFs that show how joints work
Weird but beautiful way ncient Maya used to decorate their teeth
Extreme close ups of the human eye by Suren Manvelyan

Like it? Share it!